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HomeMy WebLinkAboutWPO201800073 Approval - County 2019-08-27COUNTY OF ALBEMARLE Department of Community Development 401 McIntire Road, Room 227 Charlottesville, Virginia 22902-4596 Phone (434) 296-5832 Fax (434) 972-4126 Project: Plan preparer: Owner or rep.: Plan received date: (Rev. 1) (Rev. 2) (Rev. 3) (Rev. 4) Date of comments: (Additional) (Rev. 1) (Rev. 2) (Rev. 3) (Rev. 4) Reviewer: VSMP Permit Plan review Lewis and Drive Road Extension — VSMP Jonathan Showalter /Aaron Mabee, Timmons Group f onathan.showalter(a)timmons.com; aaron.mabee(a),timmons.com] 608 Preston Ave., Suite 200 / Charlottesville, VA 22903 University of Virginia Foundation / P.O. Box 400218 Charlottesville, VA 22904 [tmarshall(a)uvafoundation.com] 24 Sept 2018 20 Dec 2018 (Digital) 27 Mar 2019 (Digital) 5 Jul 2019 (Digital) 26 Aug 2019 (Digital /Email) 9 Nov 2018 (initial) 14 Nov 2018 7 Jan 2019 15 Apr 2019 17 Jul 2019 27 Aug 2019 —Approved pending John Anderson * PENDING: print submittal (4 revised VSMP /WPO plans; 2 revised SWPPPs). Minor edits: • SWPPP, Sec. 1 — 2019 VPDES Permit Registration Statement. Ref email sent to Timmons /Applicant: • Plan cover sheet: Notes (ref email sent to Timmons Group /Applicant: 8/27/2019 10:46 AM) WP0201800073 County Code section 17-410 and Virginia Code §62.1-44.15:34 requires the VSMP authority to act on any VSMP permit by issuing a project approval or denial. This project is approved pending receipt of bullet items, above. A. Stormwater Pollution Prevention Plan (SWPPP) The SWPPP content requirements can be found in County Code section 17-405. A SWPPP must contain (1) a PPP, (2) an ESOP, (3) a SWMP, and (4) any TMDL measures necessary. Link to County template: hqp://www.albemarle.org/upload/imai4es/forms center/departments/Communiiy Development/forms/Enizineering and _WPO_Forms/Stormwater_Pollution _ Prevention_Plan _SWPPP template.pd SWPPP a. Sign Sec. 1, VPDES Certification (Print, sign, title, date) (Rev. 1) Not addressed. Registration Statement is now completely blank. Provide all required registration information. (Rev. 2) Not addressed. (Rev. 3) Not addressed. Although SWPPP includes (Sec. 1) 2019 VPDES Permit Registration Statement, the form is incomplete. Please carefully complete 2019 Registration Statement in its entirety, accurately and completely, prior to resubmittal. (Rev. 4) Partially addressed. As follow-up: Ref. email sent 8/27/2019 10:46 AM; minor edits required to 2019 VPDES Permit Registration Statement. Engineering Review Comments Page 2 of 8 b. Lat./Lon. provided appear to be a location in Louisa County. Please revise Lat./Lon. (Rev. 1) Not addressed. See a, above. Provide and ensure Lat./Lon. coordinates match project location. (Rev. 2) Addressed. c. Sec. 5: Provide SWM Plan. (Rev. 1) Not addressed. Provide narrative that at a minimum references pond 1 and approved SDP 199800043. (Rev. 2) Addressed. d. Sec. 9, Signed Certification: please sign. (Rev. 1) Not addressed. (Rev. 2) Not addressed. (Rev. 3) Not addressed. (Rev. 4) Addressed. e. Revise inspection log to provide space for description of inspection observations —see image, below. (Rev. 1) Not Addressed. Possible misunderstanding: please revise (image, below) to provide adequate space. Expand space for recording description of inspection observation. (Rev. 2) Addressed. f. New: p. 16 of SWPPP (.PDF) is the Road Plan title sheet; please remove. (Rev. 2) Addressed. g. New: Revise SWPPP cover to include reference to WP0201800073. (Rev. 2) Not addressed. (Rev. 3) Addressed. SWM Plan —Note: Overlap /redundancy likely in SWM Plan comments. below 1. Show ponds 1 and 2 approved with SDP1997-00046, on current VSMP /WPO Application. (Also, please see email including initial review comments sent 11/9/2018 12:07 PM, and review -related email with photo attachments sent 11/13/2018 1:17 PM.) (Rev. 1) Partially addressed. As follow-up: Label ponds 1 and 2 on VSMP, especially if pond 2 provides runoff detention /treatment under SDP 199800043. There is uncertainty concerning role of pond 2. Pond 1 is labeled in Exhibit, p. 17, Design Calculations and Narrative, rev. 12/19/18, p. 17. Please label ponds 1 and 2 on the VSMP Plan as well. Note: Stormwater Runoff Considerations, C3.0, states `disturbed area drains to a large wet pond that was designed [approved SDP 199800043] to handle quantity and quality for the full build out of the research park.' Please confirm, this is the case; if so, request for pond 2 narrative or label is withdrawn. (Rev. 2) Comment withdrawn. Applicant response: `The runoff from this project drains to Pond 1 not Pond 2 which is to the north below sub basin B2. Since no stormwater from the project drains to Pond 2 no label is required. Pond 1 has been labeled on sheet CO. I' 2. Review SDP 1997-00046 (Dewberry Davis plans), and include relevant information, graphics, plan or profile information required to establish design of ponds 1 and 2 for comparison with As -built conditions. (Rev. 1) Addressed. 3. Provide As -built plan /profile drawings (or As -built information on WP0201800073) for ponds 1 and 2. No As -built drawings or information has been located in Engineering or Water Resource Division files. (Rev. 1) Not addressed. May be discussed in comment response letter; comment response letter requested via county email sent 1/7/2019 8:55 AM. (Rev. 2) Addressed. Applicant response: `As -built plans SDP 199800043 have been located by county records and scanned into their records per email and link provided by James Smith in his email 12/19/2018' [J. Howard -Smith email: 12/19/2018 7:07 AM] 4. Show ponds 1 and 2 on VSMP /WP0201800073. (Rev. 1) Partially addressed. If pond 2 is shown, please label —also, please see item 1, above (label ponds 1 and 2 on VSMP Plan). (Rev. 2) Comment withdrawn. Also, see item 1, above. 5. Please correlate: (Rev. 1) Addressed. (Note: See CV documents /SDP199800043.) a. Approved SDP 1997-00046 Dewberry Davis plans; b. WP0200600087 Cox Company plans (titled SDP2006-00113; available in CV under this Application number); c. Dewberry & Davis report titled UVA Research Park at North Fork, subtitled Stormwater Management /BMP Analysis and Floodplain Study for the UVA Research Park at North Fork, d. October 1997 d. The Cox Company Engineering Calculations /report titled UVA Research Park, Town Centers III and IV, d. 8-Mar 2007; with Engineering Review Comments Page 3 of 8 Impervious area (SF) treated by ponds 1 and 2 at full build -out (SDP 1997-00046), with impervious area to date routed to ponds 1 and 2, and with additional impervious area proposed with WP0201800073. 6. Per conversation between Jonathan Showalter and J. Anderson on 11/13, please provide Narrative outlining efforts to minimize stream impacts with proposed roadway alignment. Discuss wetland versus stream impact trade-off with proposed alignment. (Rev. 1) Addressed. Ref. Timmons email, 12/18/2018 11:09 AM, with Exhibit comparing original KHA v. current Timmons' roadway alignment, with 400 LF less stream disturbance and 223 SF less wetland disturbance. Exhibit also in CV. 7. Avoid wetlands to extent practicable. Discuss roadway CL shift to the west to avoid wetlands to extent practicable. Compare shift west stream impacts with current alignment wetland impacts. (Rev. 1) Addressed. See item 7, above. 8. Stormwater Management Note, C0.0 references "Stormwater Management /BMP Analysis and Floodplain Study for the UVA Research Park at Northfork" by Dewberry & Davis, October 1997." The note continues: `The Research Park has been master planned for Stormwater Management for the future build - out of the research park. The Majority of this road project drains to the large wet pond to the east that was designed and constructed to handle quantity and quality for the future build -out of the research park including this road connection.' End note. (Ref. document /link [CV]: http://www.albemarle.org/weblink/search.aspx?dbid=3&searchcommand=%7b%5bCDD- Planning%5d:%5bApplicationNumber%5d=%22WPO200600087%22%7d Also/same link: "UVA Research Park, Town Centers III and IV, Engineering Calculations," prepared for UVA Real Estate Foundation by Frank D. Cox, Jr., PE /Cox Company, 220 E. High St., Charlottesville —Nov. 30, 2006, Rev. March 8, 2007. This document appears highly -relevant and useful to VMSP /WPO Plan submittal. Review and include salient information from this document. See Exhibit 1, beginning p. 18 of .PDF. Also: pre -development drainage map, p. 7; a road design not identical with design proposed with WPO201800073, p. 8-9; etc.) a. Title sheet notation does not of itself sufficiently address plan requirements if compared with VA Administrative Code stormwater quality or quantity regulations. It is unclear if Applicant is requesting Engineering accept existence of a study as sufficient basis for issuing a VSMP VPDES permit under 9VAC25-870-48, without additional detail or context, including: narrative, data, routings, pond plan /profile, As -built for Ex. large wet pond, drainage maps, calculations, etc. Engineering recommends Timmons take a conventional approach and piece together information; that is, provide rationale that guides plan review, including whether 9VAC25-870-48 is basis of VSMP /WPO Plan Application (Grandfathering). Please provide reference to SDP1997-00046, which includes BMPs designed to meet then -current stormwater management requirements (also, ref. 1997 Dewberry and Davis study). The reference study is twenty-one years old. There are a few immediately recognizable approved SDPs or WPOs in Albemarle County's online document system (CV) that align with the 1997 study (WP02006-00087 does). Timmons must provide information sufficient for Engineering to approve WP0201800073 without pulling past plans, many of which are listed in CV as not approved. 9VAC25-870-48, -93 /94 (Definitions /Applicability), -95 (General), -96 (Water Quality), -97 (Stream Channel Erosion), and -98 (Flooding) likely govern proposed roadway construction. Engineering recommends query CV (or visit CDD to request /consider and review) the following possibly relevant Applications (listed by type, then chronologically): (Rev. 1) Addressed. Timmons Design Calculations and Narrative, Rev. 12/19/18: p. 3, Stormwater Management narrative; p. 4, Table 1, Drainage Areas and CN values; p. 16, UVA Research Park at North Fork (Exhibit); and p. 17, SWM Exhibit for Pond 1, 12/19/18, provide link to prior -approved SDP199800043, and sufficient detail. Also email: Paul Bjornsen (Records Management Officer, December 07, 2018 9:01 AM) to Timmons; James Howard -Smith, Records and Imaging Technician (12/19/2018 7:07 AM), to Timmons. i. ZMA2005-00002 ii. SP2008-00062 iii. SDP 1997-00046 iv. SDP1998-00043 v. SDP2000-00025 vi. SDP2000-00077 Engineering Review Comments Page 4 of 8 vii. SDP2000-00098 viii. SDP2001-00005 ix. SDP2001-00011 x. SDP2001-00047 xi. SDP2002-00064 xii. SDP2002-00072 xiii. SDP2002-00110 xiv. WPO200600087 (Approved plan not shown in CV; documents only.) 9. Remove Road Plan sheets from VSMP /WPO Plan, including: C1.1 - C1.3, C4.4 - C4.9; C6.0, C6.1, C7.0, C8.0 - C8.3: these sheets present road plan detail/s. (Rev. 1) Addressed. 10. Copy Construction Record Drawing (As -built) Policy to plans: (Rev. 1) Addressed. http://www.albemarte.orgLupload/images/forms_center/departments/Community Development/forms/Engi neering1and _WPO _Forms/WPO _VSMP _Construction _ Record_ Drawings Policy 23May2014.pdf C3.0 11. Stormwater Runoff Considerations: Expand to provide descriptive narrative connection to prior -approved site plan (SDP 1997-00046) to affirm proposed development meets state stormwater quality and quantity requirements. (Rev. 1, 2) Addressed. Also, see item 8, above. 37: please label ponds 1 and 2 on VSMP Plan (item 1, above). 12. Include note that requires Owner to obtain all required state or federal permits, including VDEQ Individual Permit, VMRC General Permit, or US ACE Nationwide permit (wetland impacts), etc. (Rev. 1) Addressed. 13. List special conditions of US ACE permit on the plans. Identify, number, and quantify area impact to wetlands (SF). Identify wetland type/s using text, labels/notes, graphic symbols. (Rev. 1) Partially addressed. Also, see items 15, 19, Sec. C. (ESCP), below. (Rev. 2) Comment persists. (Rev. 4) Addressed. 14. New: Please revise plan title to include reference to VSMP/WPO201800073. (Rev. 2) Addressed. B. Pollution Prevention Plan (PPP) The PPP content requirements can be found in County Code section 17-404. 1. See A /Sec. 6 comments, above. Revise Sec. 6 Exhibit, as needed, if plan revised. (Rev. 4, or prior) Addressed. C. Erosion and Sediment Control Plan (ESOP) Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESOP. This plan is approved. C3.0 1. Include ACDSM Paved (construction entrance) Wash Rack detail. Measure required. See ACDSM, p. 8. (Rev. 1) Addressed. 2. Define /specify slope stabilization seed mix (Ref. legend, C3.2 3. C3.0: It appears 2°d C3.0 (details) should be labeled sheet C3.1 4. C3.1 (relabeled): Include stream diversion detail; for example, sandbag dam /pump -around diversion. (Rev. 1) Addressed. 5. Provide culvert inlet protection detail. (box culvert, TSDs, etc.) 6. Provide super silt fence detail. (Rev. 1) Addressed. ). (Rev. 1) Addressed. (Rev. 1) Addressed. VESCH plate 3.25-1, or variation showing (Rev. 1) Addressed. C2.0 7. Provide at least one hundred (100) Ex. contour labels. No legible contour labels appear to be shown. (It is difficult verging on impossible to interpret existing conditions.) (Rev. 1) Addressed. 8. Label development parcel TMP. Label each adjoining parcel with TMP#. (Rev. 1) Addressed. 9. Provide Mitigation Plan for stream crossings (2:1 mitigation required). Label WPO buffer areas, if multiple areas. Provide landscape schedule for each WPO buffer area. (Rev. 1) Addressed. Note: 10 Engineering Review Comments Page 5 of 8 Timmons may want to review areas to which 2:1 planting requirement applies, i.e., impacts to buffer at stream crossings only. If the area impact to stream buffers at all perennial stream crossings combined is < 1.105 Ac., then 2:1 mitigation planting requirement is < 2.21 Ac. (of plantings). Albemarle accepts proposed 2.21 Ac. if total stream buffer impact at all crossings combined is > 1.105 Ac. Revise critical slopes labels. Replace with managed or preserved steep slopes labels. (Rev. 1) Partially addressed. Revise labels to show preserved slopes, consistent with GIS. Image, below. . 2) Addressed. 11. C3.2 — C3.5: Increase Ex. contour labels so legible. (Rev. 1) Addressed. C3.2 12. Label ST 1 floor dimensions in plan view. (Rev. 1) Addressed. 13. ST 1 design treats Max. limit, 3.0 Ac. Show 3.0 Ac. drainage area boundaries for this sediment trap. (Rev. 1) Addressed. 14. ST 1: Avoid wetlands. Relocate ST 1 since this sediment trap discharges to downslope wetlands, by design. This means, any event that exceeds capacity of ST1 will discharge sediment to wetlands, by design, which may cause permanent or irrevocable and not incidental impact. Do not propose sediment trapping measures upslope of or immediately adjacent to wetlands. (Rev. 1) Addressed (comment discussed with Timmons): Location coincides with roadway corridor. ST1 is sized for 3 Ac. DA, with SSF downslope of trap (provide break in SFF at weir). Trap, if maintained, should limit impact to downslope wetlands. Albemarle accepts the design rationale. 15. Relocate roadway if necessary to avoid and minimize wetland impacts. Alternatively, provide copy of USACE Permit authorizing proposed wetland impacts. (Rev. 1) Addressed/Acknowledged. Applicant response (to SUB201800171 /Road Plan review comment (C3.0), item 8; response d. 12/20/18): `Permit will be filed with Army Corps of Engineers. A copy of the permit will be included once approved.' (Rev. 4) Addressed. Ref. email sent to Applicant /Timmons Group 8/27/2019 10:46 AM. VWP permits included with SWPPP. Plan cover page to reference relevant permit data. 16. Label dimensions 39 cy Culv-3 inlet protection to aid review, construction, and inspection. (Rev. 1) Addressed. 17. Label Area (acreage) of Limits of Clearing and Grading, x.xx Ac. (Rev. 1) Addressed. 18. Calculate velocity (Q2) for channel at bottom of future fill slope, upslope of Culv-3. Provide soil stabilization, permanent riprap, or concrete conveyance channel as required for this channel. (Rev. 1) Addressed. Engineering Review Comments Page 6 of 8 19. Show, estimate, label area of wetland impacts (SF). Identify wetland type: emergent, riverine, palustrine. (Rev. 1) Not addressed. Also, see Sec. A, item 13. Note: Copy of USACE permit will likely address. (Rev. 2) Addressed. Applicant response: `The above requirements ... See plan sheets WIM1.0-WIM3.0' 20. List U.S. Army Corps of Engineers Nationwide permit (USACE NWP-27 /other) issued for this project. List date of permit issuance. VSMP /WPO cannot be approved without copy of current USACE permit authorizing specific impacts to specific areas identified, shown and labelled on the VSMP /WPO plan. (Rev. 1) Addressed/Acknowledged —see item 15, above. (Rev. 2, 3) Comment persists. (Rev. 4) Addressed. Ref. email sent to Applicant /Timmons Group 8/27/2019 10:46 AM. 21. Show wetland protective measures; for example, timber matting and fencing equivalent to tree protection, for wetlands to be preserved and not authorized by USACE permit to be disturbed or impacted, either temporarily or permanently, by project activity. Plans identify no wetlands to be preserved, except by virtue of location outside LOD. Recommend wetland preservation as cornerstone of design. See other comments on topic of impact avoidance and minimization, especially concerning Applicant need to acquire and provide copy of relevant federal or state wetland, stream, or aquatic resource permits. (Rev. 1) Not addressed. Note: Copy of USACE permit will likely address. (Rev. 2, 3) Comment persists. Applicant response: We currently have tree protection fencing just inside our LOD wherever they border the wetlands. This will serve a physical barrier and marker of the limits disturbance in the field. The permit silt fence inside LOD to which will serve as a physical item in the field between land disturbance and wetlands. A copy of the permit will be provided once available.' [ Emphasis added.] (Rev. 4) Addressed. Copies of VWP permits received 8/15/2019 3:48 PM. Also, ref. email sent to Applicant /Timmons Group 8/27/2019 10:46 AM. C3.3 22. Label ST2 floor dimensions in plan view. (Rev. 1) Addressed. 23. ST2 design treats Max. limit, 3.0 Ac. Show 3.0 Ac. drainage area boundaries for this sediment trap. (Rev. 1) Addressed. 24. Revise Legend to include FD and TSD. (Rev. 1) Addressed. 25. Label TSD in plan view. Label TSD CIP in plan view. (Rev. 1) Addressed. 26. Label TSDs TSD1 and TSD2. (Rev. 1) Partially addressed. As follow-up: Please label TSD-2. (Rev. 2) Addressed. 27. Increase pitch of wetlands label downslope of proposed box culvert. Apply item #19, above to sheet C3.3. (Rev. 1) Not addressed. (Rev. 2) Addressed. 28. Increase pitch of dense trees label, so it is readable and useful. Examine /increase microscopic labels. (Rev. 1) Addressed. 29. Provide sufficient and legible contour labels to guide review, inspection and construction. (Rev. 1) Addressed. 30. If TSDs convey sediment -laden storm runoff, provide sediment trapping measure at TSD outfalls. (Rev. 1) Not addressed. Provide trapping measure for sediment -laden storm runoff in plan view, or, alternatively, detail and with plan view (label) re£ to detail. (Rev. 2) Addressed. C3.4 Note. Also county email, 2/8/2019 5:28 PM. 31. Provide break in SSF at sediment trap weir outfalls (ST2, ST3). Provide break in SSF for ST1 (C3.2). (Rev. 1) Partially addressed. Provide break in SFF for ST1. (Rev. 1) Not addressed. Note: Silt fence break detail shared via email (2/8/2019 4:56 PM) is not included with rev. VSMP plan. Ensure information shared with county via email 2/8/19 is included with plans. (Rev. 3) Addressed. 32. ST3: Design table and plan label top of dam elevation should match. (Rev. 1) Not addressed. 492' v. 494'. (Rev. 2) Addressed. C3.4 33. Provide CL roadway stationing since blanket matting labels ref. stations. (Rev. 1) Not addressed. (Rev. 2) Addressed. 34. Apply comments regarding readable labels and readable contour labels elsewhere to this sheet. (Rev. 1) Addressed. Engineering Review Comments Page 7 of 8 35. CWDs must end at trapping measure, even if only a limited -volume depression defined by label. (Rev. 1) Comment withdrawn. 36. Calculate and list permanent stream impacts (LF), this /other sheets. (Rev. 1) Addressed. Ref. `Original Alignment (120' wide road section)' Exhibit in CV. 665 LF stream disturbance. 37. C3.5: Apply C3.4 review comments. (Rev. 1) Addressed. Design Calculations & Narrative, 9/24/18 (No item #1): 2. Culvert 1 Table breaks across 2 pages; reformat so visible as single sheet. (Rev. 1) Addressed. 3. Culverts 1, 2, 3 design outfall velocity exceeds 10.0 fps. Ensure labels, notes etc. identify locations requiring VESCH Std. & Spec. 3.36, and identify which type stabilization matting is required. (Rev. 1) Addressed. 4. (RP comment) Max. outfall velocity is 15fps. Ref. Drainage Plan checklist (drainage computations, p. 2). Revise design such that outfall velocity for all culverts is < 15fps (Q2). (Rev. 1) Addressed. Qio, culverts 1, 2, 3 < 15fps. 5. Provide outfall protection calculations. Ref. VESCH Std. & Spec. 3.18 plates 3.18-3 and /or 3.18-4. (Rev. 1) Partially addressed. As follow-up: please correlate p. 13-15, Design Calculations and Narrative to culverts 1, 2, 3. It is not readily apparent which plates are assigned to culverts 1, 2 3. (Rev. 2) Addressed. 6. Culvert 3 OP width 2 is insufficient. Width 1 =6.0' is likely adequate (ref. comment #31). Ref. VESCH. (Rev. 1) Addressed. Please ref email sent 8/27/2019 10:46 AM: Approval pending (brief list). Process: After approval, plans will need to be bonded (LOCs: In process; coordination —Elise Cruz, UVAF —Albemarle Mgmt. Analyst). The bonding process is begun by submitting a bond estimate . _ 4uest form and fee to the Department of Community Development. One of the plan reviewers will prepare estimates and check parcel and easement information based on the approved plans. The County's Management Analyst will prepare bond agreement forms, which will need to be completed by the owner and submitted along with cash, certificates or sureties for the amounts specified. The agreements will need to be approved and signed by the County Attorney and County Engineer. This may take 2-4 weeks to obtain all the correct signatures and forms. The County's Management Analyst or other staff will prepare the forms and check for ownership and signature information. The completed forms will need to be submitted along with court recording fees. After bonding and agreements are complete, county staff will need to enter project information in a DEQ database. DEQ will review the application information based on local VSMP authority approval. At this time, the DEQ portion of the application fees will need to be paid directly to the state. For fastest processing, this is done electronically with the emails provided on the application. DEQ should notify applicants with instructions on how to pay fees. When DEQ approves the application, they will issue a permit coverage letter. This should be copied to the county. After DEQ coverage is issued, the County can hold a pre -construction conference. Applicants will need to complete the request for a pre -construction conference form and pay the remainder of the application fee. The form identifies the contractor and responsible land disturber, and the fee remaining to be paid. This will be checked by county staff, and upon approval, a pre -construction conference will be scheduled with the County inspector. At the pre - construction conference, should everything proceed satisfactorily, a joint VSMP and grading permit will be issued by the County so that work may begin. County forms can be found on the county website forms center under engineering; htW://www.albemarle.orWdeptforms.asp?department--cdenaMMo Engineering Review Comments Page 8 of 8 Ifyou have questions /concerns, please contact me atjanderson2(&albemarle.org or at 434.296-5832 ext. 3069. Thank you J. Anderson, Engineering Division WPO201800073 Lewis and Clark Drive Road Ext 082719rev4 -Approval pending